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  4. Given below is a labelled diagram of the mammary gland, of which some parts are labelled as A, B, C and D. Based on these labels, choose the part that contains the cluster of cells which secrete milk. <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/b-vibvoyolno3nugdg.jpg />

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Q. Given below is a labelled diagram of the mammary gland, of which some parts are labelled as A, B, C and D.
Based on these labels, choose the part that contains the cluster of cells which secrete milk.
Question

NTA AbhyasNTA Abhyas 2022

Solution:

A - mammary lobe
B - mammary duct
C - lactiferous duct
D - areola
The mammary glands are paired structures (breasts) that contain glandular tissue and a variable amount of fat. The glandular tissue of each breast is divided into 15-20 mammary lobes containing clusters of cells called alveoli. The cells of alveoli secrete milk, which is stored in the cavities (lumens) of alveoli. The alveoli open into mammary tubules. The tubules of each lobe join to form a mammary duct. Several mammary ducts join to form a wider mammary ampulla which is connected to lactiferous duct through which milk is sucked out.